PowerSSO-24 Thermal Data
Figure 21. PowerSSO-24 PC Board
VN920PEP-E
Layout condition of Rth and Zth measurements (PCB FR4 area= 78mm x 78mm, PCB thickness=2mm,
Cu thickness=35µm, Copper areas: from minimum pad lay-out to 8cm2).
Figure 22. Rthj-amb Vs PCB copper area in open box free air condition
RTHj_a mb(°C/ W )
60
55
50
45
40
35
30
0
1
2
3
4
5
6
7
8
9
PCB Cu heatsink area (cm^2)
13/18